Most touring 4WDs in this country should be on all-terrains, and a fair number of owners who fitted mud-terrains would quietly admit they wish they had not. Muddies are brilliant tyres in the right place. The trouble is that the tyre that looks the part in the car park is the wrong tool for a vehicle that spends nine days in ten on bitumen and the rest on gravel, sand and formed tracks.
The choice comes down to how the two patterns behave, and to a few numbers on the sidewall that matter more than the tread.
What separates an all-terrain from a mud-terrain
All-terrains run a tighter tread with smaller gaps between the blocks. You get a quieter tyre on the highway, better wet grip on sealed roads, longer tread life, and enough bite for gravel, sand, beach work and moderate tracks. Modern all-terrains are a long way ahead of the ones people complained about twenty years ago.
Mud-terrains run big blocks with wide voids, designed to clear mud and dig into soft, broken ground. They are the right answer for boggy country, deep clay, sharp rock and heavily rutted tracks. What you trade is highway noise, more tread squirm, longer wet stopping distances, faster wear and a fuel penalty.
Hybrid or rugged-terrain patterns sit in between, with a muddie-style shoulder for bite and an all-terrain-style centre for road manners. They suit the tourer who spends real time in rough country but still drives to work on Monday.
The best test is the last twelve months of your driving. Beach runs, gravel roads, fire trails and a fortnight up the coast point to all-terrains. Wet high-country tracks, mud, rock steps and regular winching point to hybrids or muddies.
The numbers that matter more than the pattern
Load rating. Printed on the sidewall as a load index, and it is the number that keeps a loaded touring 4WD safe. A vehicle carrying a bull bar, drawers, a fridge, water and a tow ball load needs tyres rated for that weight.
LT versus passenger construction. Light truck (LT) tyres have tougher sidewalls that resist staking and cutting on rocks and sticks, and they cope better with low pressures. The trade is a firmer ride when the vehicle is running empty. Passenger-construction tyres on a heavily loaded 4WD are behind a lot of the sidewall failures we see come back from trips, which is why LT construction is the default on serious touring builds.
Speed rating. Often lower on aggressive patterns. Check it against how you actually drive, and against your insurance policy.
Size. Going up a size changes your speedo reading, effective gearing, braking and clearance, and in NSW it also counts toward the legal lift allowance. Under the current NSW rules a vehicle can be raised by up to 75mm in total without certification, made up of no more than 50mm of suspension lift and up to a 50mm increase in tyre diameter, which adds about 25mm of height. Our guide to lift kit laws and costs in NSW sets out the conditions attached, and it is worth reading before you order tyres that will not clear standard guards.
What tyres change about how a 4WD drives
Heavier LT tyres add unsprung weight at all four corners, and for most people it is the most noticeable single change they make. Steering gets heavier, stopping distances stretch a little, fuel use rises, and the suspension has more mass to control. On a vehicle already carrying touring weight, that is often when the factory springs and shocks start to feel out of their depth. Tyres and suspension are usually best planned together rather than a year apart.
Aggressive tread also needs a maintenance habit. Rotate every 5,000km to 10,000km, keep the wheel alignment right, and expect muddies to wear unevenly if you skip either.
What we recommend
For most Sydney touring 4WDs doing beach trips, the Blue Mountains, high-country gravel and the odd outback run, a quality all-terrain in the correct load rating is the better tyre on almost every measure you notice day to day. It is also the one we fit most. Step up to a hybrid if your trips lean properly rough. Go to a full mud-terrain when you have a specific reason to, and go in knowing what you are giving up on the road.
Tyre fitting sits alongside suspension, lift and alignment work in our Brookvale workshop, so we can look at the whole package rather than the tyre in isolation.
Frequently asked questions
Are all-terrain tyres good enough for serious 4WDing?
For sand, gravel, beach, fire trails and most formed tracks, comfortably. Deep mud, clay and sharp rock are where mud-terrains earn their keep.
What load rating do I need for touring?
Enough to carry your fully loaded weight with a margin. On a built touring 4WD that generally means LT construction. Bring your weighbridge figures and we will work it out.
How much noisier are mud-terrain tyres?
Noticeably, and the noise rises with speed and as the tread wears. Some owners never mind it. Others sell the set at half tread.
Do bigger tyres need an engineering certificate in NSW?
Not necessarily. Tyres count toward the total lift allowance. Up to 75mm in total, with no more than 50mm from suspension and up to a 50mm increase in tyre diameter, can be done without certification if the conditions are met. Beyond that, certification is required.
Weighing up a set for the way you actually drive? Call the Brookvale workshop on 1300 856 888 or get in touch, and we will match the tyre to your trips rather than the car park.
